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2 Sheets-+Sheet 14 J. L. BURDIOK. CYLINDER PRINTING PRESS.

No. 6,236. Patented Mar. 2'7, 1849.

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J. L.'. BURDIOK. OYLINDER PRINTING PRESS.

N0. 6,236 Patented Mar. 27, 1849.

UNITED STATES PATENT OFFICE.

JASON L. BURDICK, OB NORlVICH, NEYV YORK.

PRINTING-PRESS.

Specification of Letters Patent No. 6,236, dated March 27, 1849.

To all whom it may concern:

Be it known that I, JASON L. BURDICK, of Norwich, in the county ofChenango in the State of New York, have made certain new and usefulImprovements in the Manner of Constructing a Cylinder Printing- Press;and I do hereby declare that the following is a full and exactdescription thereof.

In my press there are two cylinders, and four forms; each form beingintended, when used for book work, or for newspapers, &c., to print onone half of the sheet; two of these forms are sustained on a platform atthe upper part of the press, there being a cylinder above them, to makethe impression; the two other forms are situated on a second platformplaced below that first named, and at a suflicient distance therefrom toadmit a cylinder to operate between them, similar to that above theupper platform. The cylinders that make pressure on the forms have eachtwo channels, or grooves along them, to admit the clips by which thesheet is held; the cylinders must be of such size as that the spacesbetwen these channels shall be suflicient to make the impresj S1011 fromone form, on one half of the sheet. The two platforms are each suspendedfrom the frame of the press by four regulating screws by the turning ofwhich the pressure of the cylinders may be readily and perfectlyadjusted.

The two forms rest during a part of the operation on the platform towhich they belong, and during another part of the operation upon asliding carriage which moves back and forth on said platform. The sheetis to be fed in by means of a feeding board, in the ordinary way, so asto be seized and held by the clips that are to carry it forward for thepurpose of receiving the impression. These clips, or sheet holders, eX-tend across from side to side of the press, their ends being made fastto endless belts, which may be formed of leather, of india rubber cloth,of metal, or any other suitable material, there being openings in saidbelts to cause them to be carried forward by the cogs of carrying wheelsthat take into them, said wheels being on the cylinder shafts.

The power to move the machine is applied directly to the axis of one ofthe cylinders, which is geared by spur wheels to that of the secondcylinder. These cylinders have at each of their ends cogs which projectout from them in the manner of a crown wheel, and the frame of each formhas cogs which rise from the sides, and into these, those on thecylinder ends gear, and carry the form under said cylinder.

hen a sheet is fed. in between the clips, the form from which it is toreceive its first impression rests upon a ledge extending along theupper part of the platform to which it appertains; the frames, or chasesof the forms have each friction rollers on their under sides to enablethem to move forward readily. When an impression has been taken from thefirst form, it immediately descends on to the sliding carriage below it,and at this time the second form will have been elevated from saidcarriage will rest upon the ledge of the platform, and be ready to givethe second impression to the same side of the sheet. During the risingof the second form the inking rollers pass over it, these being formedand situated in the ordinary way. The form that has given itsimpression, and has descended on to the sliding carriage is carried backunder the elevated form by the retreat of the carriage, which iseffected by means of spiral springs, or otherwise; and this form is thenready for elevating, inking, and giving a second impression. The sheetwhich has been thus perfected on one of its sides is carried over theforms on the second, or lower platform by means of the clips and endlessbands, where its second side is printed under arrangements in allrespects similar to those described as operating on the upper platform.

In the accompanying drawings Figure 1, is a top view, or plan of mypress; Fig. 2, is a side elevation thereof, and Fig. 3, is a verticallongitudinal section of the machine in the line ww of Fig. 1.

In each of these figures where the same parts are represented they aredesignated by the same letters of reference.

A, is the upper cylinder, having teeth a, a, at its ends.

B, B, are endless bands, that carry the clips O, G, which seize thesheet as it is fed in.

D, D, are toothed wheels on the axis of the cylinder that carry theendless bands.

E, and F, are the two forms on the upper platform, the form E, beingthat which, in the position represented, is giving the 1mpression, andF, that which is ready to rise, receive the ink, and take the place ofE;

b, b, are the friction rollers on which the forms run; 0, c, are cogs onthe edge of the frame or chase of the forms, into which the teeth a, a,of the cylinder gears.

G, G, is the platform on which the forms rest at the time of taking theimpression.

H, seen in the section (Fig. 3) is the sliding carriage which moves backand forth on the platform. In this figure, and in Fig. 1, the form F, isshown as resting on this carriage, from which it is to rise as the formE, advances; this latter form being sustained on the face G, G, of theledges on the sides of the platform. WVhen the cylinder A, has completedthe impression from the form E, said form will have arrived at openingscl, d, under its friction rollers b, b, and the form will descend on tothe sliding carriage H, by its own gravity, there being springs beneaththe friction wheels to ease it down. The ends lb, of the slidingcarriage turn up vertically, or at right anglesfrom its bottom at eachof its ends, and bear against the edges of the frames or chase of theforms; and the carriage is made to advance by the bearing of the foreedge of the form against this part, thereby overcoming the force ofsprings or weights which tend to move the carriage back. When the format E, has descended the carriage is suddenly forced back by the springs,or weights, that are to act upon it, and the momentum given to the formby the motion of the carriage, causes it to slide to the opposite end ofsaid carriage, and to occupy the situation of the form F, in thedrawings. During the latter part of the advancing of the form E, theform F, will have been raised to the level of the form E, and the teethof the cylinder will have engaged with those on its edges. By the movingback of the carriage the ends 72, on its fore part will be brought intocontact with the fore edge of the form F, and as this advances thecarriage will necessarily.

advance with it. At the rear end of the sliding carriage there are twosprings j, j, that serve to press the rear form into contact with theforward one, when the former is raised up; this is essential to thecorrect action of the gearing.

I will now describe the manner in which the form F, is elevated, so asto rest on the ledges G, G, of the platform. At 6, 6, there are portionsof these ledges, which are attached thereto by joint pins, and whichwhen forced up from a part of the face thereof, but which when not heldup, fall .and form inclined planes, up which the form F, may be made topass by the aid of its friction rollers, so as to elevate it to theproper level. As the form was run back by the spring or weights, so asto bring it into contact with the vertical parts h, of the rear end ofthe carriage the pieces 6, 6, were raised by the friction wheels 6, b,and then fell, forming the above named inclined planes. The advance ofthe carriage by the bearing of the fore end of the acting form againstit will consequently cause the form F, to rise up the inclined planesand its friction rollers to bear on the solid part of the ledges of theplat-form. To admit the forward rollers Z), of the rising form to passon to the ledge of the platform, the portions f, f, of said platform arecapable of being elevated by turning on joint pins, after which theyfall by their own gravity, and form a part of the general surface.

Fig. 4, is an inside view of one of the sides of the platform, showingthe respective jointed pieces, and the friction wheels of the forms, asalso the openings d, d, which allow the forward form to descend,together with the springs g, g, for easing it down.

Fig. 5, is a top view of the platform, and of the sliding carriage asseen when the cylinder and forms areremoved. I, I, are rods attached atone end to the platform their other ends passing freely through holes inthe sliding carriage. J, J, are spiral springs which force the carriageback when it is at liberty to pass in that direction. A weight passingover a pulley may be substituted for these, or other springs.

In the side elevation Fig. 2, K, K, are screws tapped into ears attachedto the platforms; their heads bearing on the frame of the machine, andthereby serving to adjust said platforms with perfect accuracy. L, L,are the axles of the cylinders. These at each end carry spur wheels ofequal size that gear into each other, and thereby communicate therequired motions. These are not shown in the drawings. The operation onthe lower platform is precisely the same with that of the upper, all theparts being repeated.

The clips C, may be operated as in other machines in which they arecarried by endless bands, as in this machine; the manner in which I havecaused them to keep hold on the paper during the time that they arecarrying the sheet is as follows. At each end of the upper part of theclip, which is hinged to the'lower, there is a cross piece 2', and thisbeing received within a groove w formed on the inner edges of the frame,along its whole circuit, keeps it closed, and when liberated from theseit springs open, and lets go the sheet. In the section Fig. 3,

tive parts of my cylinder printing press, and shown the operationthereof, what I claim therein as new, and desire to secureby LettesrPatent, is,

1. The manner in which I combine the two cylinders in my printing press,with their respective platforms one immediately above the other, underan arrangement such as is herein described, by which each of thecylinders is made to take impressions from the forms on the platform towhich it appertains, the lower cylinder perfecting the sheetwhich hasbeen printed on one side by the upper cylinder and forms.

2. I claim the. manner of advancing the forms, and of carrying themunder the cylinder by the gearing of the toothed wheels on the ends ofsaid cylinders into teeth rising up from the edges of the chase, orframe in which the form is locked up.

3. I claim the manner set forth of con structing the sliding carriages,and of com-

